Automatic gas-tap control



Dec. 17, 1929. c. A. JACOT 1,739,5295

AUTOMATIC GAS TAP CONTROL Filed Feb. 23. 1928 Patented Dec. 17, 1929 I I Uldl llfil STATES PATENT OFFICE a CHARLES- AMVI .mco'nor LA cHA x-nn-ronns, swrrznannnn l v i AUTOMATIC oAsmrcon'rnon i i Application filed February 23, 1928, Serial No. 256,281, and in Germany December 20, 1927;

My invention relates to a device for autos this arm co-operates with a crank f formed matically closing a gas tap under the influ- [at one end of an inclined rod cwhich is pivenceof a boiling liquid so as to prevent the otally supported at 'b in a bracket connected gas and the liquid from being wasted and to the casing The other end of therod is the liquid for instance milk or the like, from pivotally supported at the upper end of a boiling over and. contaminating the gas substantially vertical rod 0 adapted to slide burners. with a rather tight fit in a bracket-secured to With this object in View the invention conthe frame a. The rod 0 carries a, doublesists in the provision of a frame adapted t armed lever one end cl of which iscoiledv so 10 be supported partly on the cooking vessel and as to form a convenient operating handle,

partly on thegas-tap and furnished with a while the. other end d is pivoted to a rod 70 spring controlled tap-closing element as well which is loosely guided in a bracket 41 secured as with a thermostatic retaining element to the lower part of the rodjewhich is formed whereby the closing element is normally preat its lower end with a hooker crutch i. The

vented from operating, the thermostatic elelower end'of the rod e carries a'ring g which 60 ment being suspended within thevessel and is cut openat'h and notched so as to'forman adapted to open under the influence of the .oval gap h wherein the hookz'can be gripped, heat so as to release the closing element when The ring '9 is, laminated. and formed of two the liquid hoils. r metals with different coefficient ofexpan- Fig 1 of the accompanying drawings sion, the metal with the greater expansion 6 represents a side view of the device in operabeing situated inside and the other; outside tive position, the cooking vessel being shown the ring; For instance the inside-of the ring in section; Fig. 2, a side view of the device may be composed of brass and vthe outalone and in inoperative position;'Fig. 3, a side of steel.,-Owing to this compositioncthe V top view of the device in the operative posi-[ ring will tend tost raighten out so as to widen 70 tion; Fig. 4, a front view of the device in the the .gap h, under the influence of heat. The I operative position, and Fig. 5, a rear view rod it carries a collar a which is adapted, by of the same. l f abutment against the bracket '0, to limit the The device consists'of a frame composed downward movement of the rod. fTh'e bear- I of a U-shaped wire structure one end of which ingsv of the rod 0 are large enough to allow 7 is attached to a casing 0, the other end being this rod to be deflected and the rods 6 and '70 hooked as shown in Figs. 1 and 2 for the conto-beadjusted in their'supports, as indicated venient suspension of the device. The casing by dotted lines in Fig. 1. The rotary' move- 0 contains a. spring-m which controls a boss ment'. of'the' crank f is limited by a wire I having a square aperture, and in this aperbracket t secured to the casing 0. 3 v

ture a square, vertical rod n is held so that it The action is as follows: I o must rotate with the boss while being free to r The part A of the device is supported by slide up and down in the same with a certain meansof theframe a over the cooking vessel amount of friction. The lower end of the rod 9 and the part B' is supported by means of is fitted with a shoe p adapted to be placed the shoe pen the gas tap s, the 'rodn being 35 over the operating handleof the gas taps, adjusted in the casingo so asto maintainthe'j as shown by dotted lines in Fig. 1', so as to frame in a substantially horizontal posltlon. couple the rod and the boss to the tap. The Previous to theapplication of the device, the boss carries a crank arm m situated outside lever'd, d is turnedso as to put the hook and above the casing 0. The crank-pin Zof into engagement with the rin g.= Th l 9O 7 40 f: tap open and to release the operating rod on 'attalning' agrven temperature to permit sa d c turns with the lever'and the movement of shoe 7?, which participates in themovement the rod and of the crank f causes the arm m to be turned so as to tension thespring r. The

will then be in a position to engage the open gas tap s; The ring 9 is normally capable of. retaining the rod 70 in opposition to the action 70f thespring 9 which tends to restore the ele mentsv to their normal positions. When the -1i) device has been placed in position on the ves-.

vsel Q and on the gastap, the rods 6 and k are adjustedin their Supports so as to hold the I e aring g in asuitable position either above or a below the surface of the liquid. In the case.

of milk the ring should be held immediately above the surface," In the case of coffee or the mechanism, a bracket on the frame, the rod carrying said element beingslidably mounted in said bracket for varying the position ofthe retaining element relative to the j frame,

means on said element carrying rod for guiding the'arresting rod, and a collar on the ar resting rod adaptedto limit the movement of the latter by engagement with said guiding means.

In testimony whereof I afiixfmy signature. Y i CH. AMI JACOT.

7 like, it should beplaced below the surface. As

soon as the liquid attains boiling temperature, and, in the case of milk,rises into contact with V the ring 9, the latter, owing to its expansion,

' releases the rod is, and the spring 1'. then re stores the elements totheir normal positions and at the same time turns and closes the gas tap s so as to extinguish the cooking vessel.

Iclaimi'. r p 1 1.' An automatiogas tap controlling device comprising an elongated frame, a rotatable,

flame under the spring-controlled rodsupported atone end ofv the same, means for connecting' said'rod operv atively w-ith'thegas tap, a springco-operat- 'ing with saidrod,acrank mechanism for V turning said rod in opposition to said spring,

at the opposite end 'ofthe frame, and an ar-.

raxthermostatic retaining element supported resting rod adaptedto be moved by said crank I mechanism into engagement with the retain-- ing element when the-tap operating rod is tensioned, the a retaining element being normally en-gaging the arrestingrod to hold said spring to closethe tap. a v V V in claim'l' in o'ombi- 2. The device claimed nation a boss'arranged as a motion trans 1 mitting medium between the tap operating rod and its spring, the rodbeing axially slid- F able in said boss.

e. The device claimed in claim l'incombi-jl nation with a boss arranged as, a motion transr mitting medium betwen the tap operating rod and its spring, and a-crank arm mounted on said'boss for co-operation with the crank mechanism, the tap operating ly slidable in said boss.

4. The device claimedin'claim 1 in combination with a rod carrying the retaining elei v,ment and'one ofthe bearings forthe crank 1 mechanism, a-bracket on the frame, the rod 7 carrying said element being slidably mounted in said bracket for varying the position of the retaining element relative to the 'frame. v l

- 5. The device clalmed-in claim .1 in .com- I bination with a rod carrying the retaining ele-" i ment and one'of the bearings "or the r-rank V b igaxian .q. 

